import java.util.Scanner;
public class Example2_3 {
	public static void main(String args[]) {
		System.out.println("请输入若干个数字，每输入一个数回车确认");
		System.out.println("最后输入数字0结束输入操作");
		Scanner reader = new Scanner(System.in);
		double sum = 0;
		double x = reader.nextDouble();
		while(x!=0){
			sum = sum+x;
			x = reader.nextDouble();
		}
		System.out.println("sum = "+sum);
	}
}
